added readme config info

README.md

@@ -1,3 +1,48 @@
 # gitea-matrix-bot
 
 A bot to listen for gitea webhooks and post to a matrix channel
+
+# Usage
+
+## Configuration
+Copy config.ini.example to config.ini or creat a file called config.ini with the
+following options:
+
+```
+[http]
+# The path the listener will expect the post data
+http_uri = "/post"
+
+# The port the listener will listen on
+http_port = "9000"
+
+[matrix]
+# The matrix server to connect to
+matrix_host = "http://matrix.org"
+
+# The matrix room to post to
+matrix_room = "#my-awesome-room:matrix.org"
+
+# User credentions of the bot for posting to the room
+matrix_pass = "supersecretpass"
+matrix_user = "my-awesome-bot"
+```
+
+Then start the bot. It will listen on the configured URI for incoming gitea
+hooks.
+
+## Create gitea hook
+
+Create a new webhook in gitea. You an add a webhook to a single repository or
+add a default webhook that will apply to all you repos (recommended)
+
+- Choose the Webhook type `Gitea` for you Webhook
+- Configure which events you want to send. You can also select `All Events`
+- Set the Target URL to your host + the value you configured in the `config.ini` file. (e.g. `http://myserver:9000/post`)
+- Make sure that port is reachable/forwarded if you are behind a router and
+	check your firewall
+- Set `POST Content Type` to `applicatino/json`
+- Add a secret (passphrase, password)
+
+It will probably like this:
+![gitea scrot](./gitea-scrot.png "Gitea Screenshot")